Machine for winding yarn and the like



Nov. 15, 1938. c. MARSDEN 2,136,515

MACHINE FOR WINDING YARN AND THE LIKE CHARLES MARSDEN N I ama- Filed May25, 1955 v 2 Shets-$hef 1 :1- QIIIN' .Qi 3 J 3 z ,2; *es LN jg 5 5 g z mW 1 A. n l:@[:

\ I l a 1 I I i I 2 l I v a $4 a" 6 g E w 1 Kg g I m i \NVENTOR J t gATTORNEY Nov. 15, 1938. 'c. MARSDEN 2,136,515

MACHINE FOR WINDING YARN AND THE LIKE Filed May 25, 1956 2 Sheets-Sheet2 INVENTOR CHARLES MARS DEN BY. Q

ATTORNEY Patented Nov. 15, 1938 UNITED STATES PATENT OFFICE MACHINE FORWINDING YARN AND THE LIKE Charles, Marsden, Ahmedabad, BombayPresidency, India Application May 25, 1936, Serial No. 81,741 In GreatBritain June 18, 1935 This invention is for improvements in ma 2 Claims.

chines for winding yarn and the like in conical chases on cops orbobbins.

One object of the invention is to provide a machine which will winditthe yarn or the like in such a way as to produce a firm,non-shattering chase.

Another object is to increase the amount of yarn orthe like which can bewound into a given package of predetermined diameter.

A further object is to provide cam for effecting relative reciprocationbetweenthe thread-guide and the windingspindle to traverse the yarn orthe like longitudinally of the latter, which cam has a cam-track whereofthe feed and return portions are of different length, and the inventionis characterized by the combination of features that (a) thetraverse-cam is geared to the winding spindle to rotate at a speed whichis in constant proportion'tothe speed of rotation of the latter and (b)the cam has its cam-track so formed that the speed of traverse in eachdirection varies along the stroke of the cam. By this combination offeatures it is ensured that during each portion of the traverse theturns of yarn or the like are spread out at some points and laid moreclosely together at others in a predetermined manner.

By winding the yarn or the like in this way a firm non-shattering chasecan be produced, and in the case where the package is built up on aplain tube'the heel can be produced more quickly than usual and moreyarn or the like can be incorporated in a package of given dimensions.

It is preferred that the In carrying out the invention the traverse-cammay be so arranged that the shorter portion of its cam-track serves totraverse the yarn or the like from the largest to: the smallest.diameters of the conical chases. ducing a firm package.

This will. assist in pro- There will now be described by way of exampleonly and with reference to the accompany-- ing drawings a preferred formof winding machine in accordance with the invention.

In the drawings- Figures 1a and 1b show the winding machine in plan viewwith certain parts omitted;

Figure 2 is a view in elevation and partly in cross-section of theportion of the machine shown in Figure 1a; and

Figure 3 isa diagrammaticview illustrating the shape of thetraverse-cam.

Like reference numerals indicate like parts throughout the drawings.

As shown in the drawings, the machine comprises a main frame ID- havingbearings II for a tubular clutch-member l2 and a spindle l3 which lieswithin it. The tube 12 carries a. grooved-wheel M which abuts against aspring l5, the other end of which engages a collar l6 aflixed to thespindle [3. The worm l'l forms part of a tube which is also affixed tothe spindle l3.

Rotatably mounted on the left-hand end of the spindle I3 is a pulley I9having a conical face to co-operate with a clutch-member 20 formedintegrally with the tube l2. The outer end of the spindle I3 issupported in a bracket 2|.

The right-hand end of the tube I2 is formed with dogs 22 adapted toengage with corresponding slots in the collar l6 whereby a driving-comnection is established between the tube l2 and the collar it so thatwhen the clutch-member 28 is in frictional engagement with the pulleyl9, rotation of the pulley drives the spindle l3. 7

The right-hand end of the spindle carries spring-fingers 23 to engagethe end 24 of a'copholder; the other end 25 of the cop-holder beingsupported by a centering-spindle 26 mounted in bearings in a plunger 21pressed towards the cop by means of a spring 28 and slidable in a guide29. The plunger 21 terminates in a knob 39 whereby it may be retractedmanually.

The worm I! (see Figure 2) engages and drives a worm-wheel 3| having cutin its face (as described in my co-pending application Serial No. 81,742of even date herewith) a cam-track of two portions 32 and 33. The trackis engaged by a follower 34 on the shorter arm 35 of a bellcrank lever35, 36, pivoted. to the frame at 31. The arm 36 is pivoted to a link 38which is in turn pivoted at 39 to a traverse-rod 40 slidable in atubular guide 4| and in a bush 42. It will be seen that the worm driveensures that the cam 32, 33 is geared to the. winding spindle to rotateat a speed which is in constant proportion to the speed of rotation ofthe latter.

The traverse rod 40 carries a screw-threaded extension 43 whereon aremounted a progression-wheel 58 and a stirrup 6| supporting thethread-guide shown at 62. The progressionwheel 58 has a hub 59 freelyslidable along the extension 43 and embraced by the stirrup 6|. Aresilient wire 50 on the progression-wheel 58 en-- gages thescrewthreads of the extension 43. The latter is coupled to the traverserod 40 by a pin 48 engaging in a slot 41 in a. former bar 46, the latterbeing arranged to be received in a diametral slot in the extension 43and having a screwthreaded end 44 whereby it is secured to the traverserod 40 and retained in place by a locknut 45. The other end of thescrew-threaded rod 43 ismounted in a universal joint 54 in a sleeve 55attached to a bracket 51 which is an extension from the main frame Ill.

The former bar 46 has an inclined and slightly concave profile adaptedto engage the interior of the hub 59 of the progression-wheel 58 whenthe progression-wheel is at the left-hand end of the screw-threaded rod43. The engagement between the hub 59 and the former bar 45 rocks thescrew-threaded extension 43 about the universal joint 54 to bring theperiphery of the pro gressiomwheel 58 towards the cop-holder forbuilding the heel on the cop at the commencement of the windingoperation. The said rocking of the rod 43 takes place against the actionof a tension spring 49 acting on the pin 48. For initial adjustment ofthe rod 43 towards or away from the winding spindle a screw 52 isprovided acting on the pin 48. The former bar 45 and the associatedparts are constructed as described in co-pending application Serial No.33,187 filed 25th July, 1935.

The traverse-cam 32, 33 is of a special shape as is illustrated inFigure 3. Its shorter portion 33 occupies approximately of a completerotation so that its longer portion 32 has more than three times andnearly four times the angular extent of the shorter portion 33. Alsoeach of the portions 32 and 33 of the cam has a profile somewhat steeperthan that of an Archimedean spiral. For comparison the chain lines shownat E3 and 74 in Figure 3 illustrate the profile of Archimedean spiralsof the same throw and angular extent as the cam portions 32 and 33. Thatis to say the spirals l3 and T4 are so formed that through a given angleof movement there is always the same extent of radial throw. With thecam portions 32 and 33, however, the extent of radial throw over a givenangle of movement increases gradually from the lowest point of the camshown at T5 to the highest point shown at '46. This is shown moreclearly by the markings given on a radius line 11 passing through thepoint '56. These markings are arrived at by dividing the angle subtendedby each cam portion and 33 into equal parts by radius lines i8, i9 anddescribing, about the axis of rotation of the cam, concentric circles80, 8|, 82 83 passing respectively through the lowest point '15 of thecam and the points at which the radius lines F3 and "i9 intersect thecam profile 32, 33. The cam is so designed that the distances betweenadjacent markings shown on the radius line 11 increase from the centerof the cam radially outwardly by amounts corresponding to the terms of ageometrical progression. Thus, if the radius of the circle 80 isrepresented by R, the

radii of the circles BI, 82, 83 etc. may be represented by etc., or inother words, the intersections of the circles 80 to 89 with the radiusline H mark off together with the point 16 ten distances representingthe radial cam-throws of the ten divisions of the cam profile and thesedistances are equal to y+b, y+2b, y+4b y+512b. By subtracting each ofthese distances from its succeeding distance, there is obtained thefollowing geometrical series having the common ratio 2:b, 2b, 4b, 8b25622 The symbols R, 3 and b have been given for convenience for theirvalues may be varied, as may also be the common ratio, to suit differentconditions of winding, if desired. The profiles of the cam portions 32and 33 are so shaped as to give, adjacent to the highest point 16 of thecam, a speed of traverse which is approximately three times thatadjacent to the lowest point of the cam.

When it is required to build a cop 63 on a plain cylindrical tube theprogression-wheel 58 is moved to its extreme left-hand position (thespring 60 being released for this purpose) until the hub 59 rides alongthe former bar 46 and. consequently rocks the screw-threaded rod 43 tobring the progression-wheel towards the Winding spindle. With theperiphery of the progression-wheel 58 just touching the bare cop tubethe machine is set in motion and winding commences. The spindle l3rotates in the direction of the arrow shown in Figure 1a so that theworm wheel 3| is driven clockwise as seen in Figure 2. The shape of thecam-track 32, 33 causes the traverse rod to be moved outwardscomparatively quickly owing to the short length and comparatively steepangle of the spiral 33 but the inward movement of the traverse rod isperformed at a much slower speed owing to the greater length and moregradual slope of the spiral 32. During the inward movement of thetraverse rod 40 the turns of yarn are, therefore, laid more closelytogether. The inward traversing movement of the traverse rod may thus betermed the main or laying-on traverse. During the outward movement ofthe traverse rod the turns of yarn are spaced relatively widely apartand therefore at a greater angle to the axis of the winding spindle. Thewidely spaced turns of yarn laid during the outward movement of thetraverse rod cross the turns of the preceding layer approximately atright angles and serve to bind them in place.

During the winding operation the winding spindie [3 rotates at aconstant or approximately constant speed and the movement of thetraverse rod 45 in each direction is gradually varied so that thehighest speed of traverse occurs when the traverse rod is at a pointadjacent to its outer extreme of travel. The variation of speed in themain or laying-on traverse causes the turns of yarn to be closertogether at the heel of the cop than towards the nose end and therebyserves to build up the heel of the package more quickly than wouldotherwise happen. The building of the heel is controlled by theprogression-wheel 58 which acts, in known manner, to advance the pointof winding-on from left to right as seen in Figure 1b. At thecommencement of the winding operation the progressionwheel 58 isdisplaced to a position adjacent to the yarn support by the action ofthe former bar 46, and as layers of yarn are laid on the yarn support,the periphery of the wheel 58 makes contact with them and is rotated soas to be moved progressively towards the right as seen in Figure 1b. Thestroke of the thread-guide 62 is thereby also progressively displaced.As the hub 59 of the progression-wheel travels to the right thescrew-threaded rod 43 gradually returns under the action of its spring49 into a position parallel with the winding spindle. When it hasreached this position the progressive displacement of the initial layersof yarn has resulted in the building of the heel. Subsequently the yarnis wound in conical chases to form a substantially cylindrical packagewith coned ends. During the building of the heel the variation in thespeed of the inward movement of the traverse rod 40 causes a greatermass of yarn to be laid at the left-hand end of each layer as seen inFigure 1b and consequently the building of the heel is accelerated. Itfollows from arapid building of the heel that the quantity of yarn whichcan be wound into a package of given diameter and length is increased.After the heel has been formed the variations in the speeds of theinward and outward movements of the traverse rod 40 have no effect onthe shape of the cop, but due to the Winding on of a greater amount ofyarn at the base than at the nose of each chase the operation of theprogression wheel is made more certain. The change in speed of thelaying-on traverse due to the special formation of the cam portion 32also assists in producing a firm package, due to the spreading out ofthe turns of yarn towards the nose of the chase, the tendency is to winda tight nose which will support the rearward layers or turns and preventthem from "sloughing off.

During the movement of the traverse rod by the cam portion 33 the yarnis laid in more open formation and these open wound turns serve to bindthe previous layer in place. The function of the change in speed in thetraverse rod due to the special formation of the cam portion 33 is asfollows. To preserve a uniform crossing angle between the turns laidduring the quick return and the turns laid in the preceding layer.

The laying-on or slow traverse and quick return traverses can take placein the opposite directions to those I have provided.

The provision of a concave profile to the former bar 46 has the effectof producing a convex shape to the heel of the cop.

It is found possible with the variable speeds of traverse provided bythe cam 32, 33 still to obtain a firm tight wind even though the profileof the former bar is concave.

When the cop has been fully built the progression-wheel 58 operatessuitable devices, such as those described in my co-pending applicationSerial No. 33,187, to release the cone 2!] from the pulley l9 andthereby interrupt the drive of the machine.

In the method of operation described above the screw 52 is so set thatafter the progression- Wheel 58 parts company with the former bar 46, asin the position shown in Figure lb, the screwthreaded rod 43 liesparallel to the winding spindle and, as shown in the drawings,co-axially with the traverse rod 40. However, the parts may bedifferently arranged so as to give any desired shape to the heel of thecop. The

parts may also be arranged so as to wind on to a pirn having a preformedconical end on which the conical chases of yarn are laid. Thisarrangement can be secured by moving the spindle I3 to the right (asviewed in Figures 1a. and 2) relatively to the tube 12, collar 16 andworm H. The endwise movement of the spindle may be permitted byreleasing appropriate grub-screws which are subsequently re-tightened.The extent of movement of the spindle need only be sufficient to providethat, at the commencement of the winding operation, the hub 59 of theprogression-Wheel 58 is out of engagement with the former bar 46.

It is to be understood that the invention is not restricted to theprecise constructional details shown in the drawings. An alternative wayof adapting the machine to wind on to a coneended pirn is to turn theformer bar 46 to a suitable extent about the axis of the traverse rod40.

I claim:-

1. In a machine for winding strand material in conical chases havingmeans for rotatably supporting a package, means for rotating thepackage, traverse-mechanism for traversing the strand materiallongitudinally of the package, gearing positively coupling saidtraverse-mechanism to the package-rotating means, and a progressiondevice for progressing the traverseroke along the length of the package,the combination comprising a rotatable traverse cam, and a track on saidcam having feed and return portions of different lengths and having eachof said portions of the track so formed that the radial cam-throws of aseries of divisions of the camtrack subtending equal angles at the axisof the cam are so correlated that the differences in radial cam-throwbetween each successive adjacent pair of cam-track divisions increase inaccordance with a geometrical progression towards that point on thecam-track which corresponds to the feed of the strand material to thenose of the chase.

2. In a machine for winding strand material in conical chases having arotatable winding spindle, traverse-mechanism for traversing the strandlongitudinally of the winding spindle, gearing positively coupling saidtraverse-mechanism to the winding spindle, and. traverse-progressionmeans for advancing the traverse-stroke along the winding spindle, thecombination comprising a rotatable traverse cam, and a cam-track on saidcam having feed and return portions which are of different lengths withthe angular extent of the longer portion at least three times that ofthe shorter portion and which are each formed to give a graduallyincreasing speed of traverse towards the nose of the chase with atraverse speed at the nose of the chase approximately three times thatat the base of the chase and which portions are each so formed that theradial cam-throws of a series of divisions of the cam-track subtendingequal angles at the axis of the cam are so correlated that thedifferences in radial cam-throw between each successive adjacent pair ofcam-track divisions increase in accordance with a geometricalprogression towards that point on the cam-track which corresponds to thefeed of the strand material to the nose of the chase.

CHARLES MARSDEN.

